Typewriter ribbon



ly adjacent to either edge of the base I.

Patented Sept. 9, 1941 TYPEWRJTER RIBBON Harold F. E. Dixon, Douglaston, N. Y., asslgnor to Columbia Ribbon and Carbon Manufacturing Company, Inc., Glen Cove, N. Y.

Application August 21, 1940, Serial No. 353,458

1 Claim. (Cl. l97172) My invention relates to improvements in type- 1 writer ribbons and more particularly to ribbons of the paper base varietyhaving a coating of carbon ink on one surface thereof. One object 7 of my invention is to provide a ribbon having no ink along, or immediately adjacent to, its edges. Another object is to provide a ribbon having two .or more colors of ink thereon which are distinct and separate, and do not overlap or intermingle with each other at their adjacent edges.

and a coating of adhesive 2, upon which are placed two narrower strips 3 and 311 each having on their exposed surfaces a carbon ink coating 4 and la respectively. which coatings may be of different colors. For example the ink coating 4 may be black while the ink coating 4a may be red.

It willbe noted that the two strips 3 and 3a are so placed on the surface of the base I that there -is a space between their outside edges and the Other objects and advantages of the invention will be evident from the following description, or will be obvious to one skilled in the art, or may be learned by the practice or use of the invention.

In this description and in the following claim, I use the term "paper in its broadest sense and I intend to include therein any membranous material which is suitable or adaptable to the purpose described and claimed.-

In the accompanying drawing I have shown, diagrammatically, but not to scale, three of the various forms in which the invention may be put in practice.

Of the drawin Fig. 1 shows a fragment of ribbon made in accordance with the invention and having but one color of carbon ink coating upon its printing surface. p

Fig. 2 shows a fragment of ribbon having two colors of carbon ink coating upon its writing In the drawing like characters refer to like edges of the base strip. Also, it will be noted that the inner adjacent edges of the strips 3 and 321 do not touch each other and therefore the two colorsof ink upon their surface do not overlap or intermingle or blend with each other, but are kept' apart and separated by the space between the strips, however slight this space may be.

In Fig. 3 are shown three separate strips desig- Other forms, which embody the spirit of the invention within the scope ofv the appended claim are intended to be included in the invention. I I

The advantages of the invention lieenotalone in the use of the product whereby the clean unelements of the invention. A strip I of thin paper or other suitable membranous material, forms the base -or-backing of the ribbon. Upon one surface of this base I apply a coating of adhesive 2 which may be a glue or paste having suitable characteristics. While this coating of adhesive is still wet or tacky I apply to the sur-v face of the strip of backing or base a narrow strip I of thin paper upon one surface of which there has previouslybeen placed a carbon ink:

symmetrically located thereon, along its median line. so that none of the carbon ink is immediate In Figure 2 is shown. another form or ribbon of the two colortype comprising a base strip Its almost entirely from the edges of typewriter ribinked edges-of the ribbon protect the hands of the user from becomingsoiled and the complete and effectual separation of the colors prevents their intermingling, but there are distinct advantages in the manufacture of theproduct resulting from the ability to coat wide rolls ofpaper 1 with the carbon ink and. thereafter cut the inked rolls into narrow rolls of the required width to esive to the base or backing strip, either singly or two or more be attached by means of an edit may be applied simultaneously,

Another advantage of the invention lies in the k o, lessened danger of particles of carbon ink known as fly being scraped or rubbed from the surface of the ribbon as it passes through the slots located on each 'side of the point where the type I bars strike. When a typewriter ribbon, the ribbon of the variety having ,a paper or equivalent membranous base, is inked along its edges there is more or less scraping or rubbing of small-flakes or particles of ink from the sharply cut edges.

These particles get on the paper and lessen the neatness of the work. They get into the type and clog them. They get on the surfaceof hectograph master sheets and are reproduced on copies I made therefrom. These fly particles originate" adhesively attached to one surface of said base, said adhesive attachment being the sole means for holding the coated strips in their spaced apart position on the base.

HAROLD F. E. DIXON. 

